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alexgriva [62]
3 years ago
8

Solve x + 3y = 9 3x − 3y = −13

Mathematics
2 answers:
love history [14]3 years ago
7 0
X + 3y = 9
3x - 3y = -13
---------------------  add the equations
4x  = -4
divide both sides by 4
x = -1

plug -1 back into either equation and solve for 'y'.
x + 3y = 9
-1 + 3y = 9
add 1 to both sides
3y = 10
divide both sides by 3
y = 10/3 or y = 3 1/3

(-1, 10/3), OR (-1, 3 1/3)

Minchanka [31]3 years ago
5 0
X + 3y = 9
3x - 3y = -13
--------------add
4x = - 4
x = -4/4
x = -1

x + 3y = 9
-1 + 3y = 9
3y = 9 + 1
3y = 10
y = 10/3

solution (-1,10/3)
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You'll never shine if you don't glow

Hey now, you're an all-star, get your game on, go play

Hey now, you're a rock star, get the show on, get paid

And all that glitters is gold

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